1006500111601 has 4 divisors (see below), whose sum is σ = 1007647775092. Its totient is φ = 1005352448112.

The previous prime is 1006500111581. The next prime is 1006500111619. The reversal of 1006500111601 is 1061110056001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 422500000000 + 584000111601 = 650000^2 + 764199^2 .

It is a cyclic number.

It is not a de Polignac number, because 1006500111601 - 2¹¹ = 1006500109553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1006500111401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573830430 + ... + 573832183.

It is an arithmetic number, because the mean of its divisors is an integer number (251911943773).

Almost surely, 2^{1006500111601} is an apocalyptic number.

It is an amenable number.

1006500111601 is a deficient number, since it is larger than the sum of its proper divisors (1147663491).

1006500111601 is an equidigital number, since it uses as much as digits as its factorization.

1006500111601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147663490.

The product of its (nonzero) digits is 180, while the sum is 22.

Adding to 1006500111601 its reverse (1061110056001), we get a palindrome (2067610167602).

The spelling of 1006500111601 in words is "one trillion, six billion, five hundred million, one hundred eleven thousand, six hundred one".